{"title":"LS7 Rectangle Port Cylinder Heads","description":"\u003cp\u003eLS7 Style Port Cylinder Heads\u003c\/p\u003e","products":[{"product_id":"mangum-racing-brodix-ls7-273cc-ls7-cylinder-heads","title":"Mangum Racing Brodix LS7 273cc LS7 Cylinder Heads","description":"\u003cp\u003e\u003cspan\u003eMangum Racing CNC Ported Brodix 273 LS7 Cylinder Heads\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBuilt from the race-proven Brodix LS7 casting, the Mangum Racing 273 program is designed for high-rpm, large-displacement LS combinations that demand elite airflow and structural integrity.\u003c\/p\u003e\n\u003cp\u003eFeaturing a 12° valve angle and OEM LS7 valve spacing\/valve length, this 6-bolt casting delivers exceptional port efficiency while maintaining compatibility with LS7-based platforms. With a 273cc CNC intake runner and optimized 93cc exhaust port, this cylinder head is engineered for serious naturally aspirated builds and high-output boosted applications where the customer wants a near bolt on cylinder head.\u003c\/p\u003e\n\u003cp\u003eEach set is fully CNC machined in-house on our Centroid 5-axis machining centers and finished on Newen seat and guide equipment. Every head is hand blended, assembled, and inspected in small batches to ensure dimensional accuracy and repeatable performance.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eAirflow Performance\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eTested on a SuperFlow 1020 with a 4.125” bore plate\u003c\/p\u003e\n\u003cp\u003eIntake (Radius Entry)\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e.200” – 160 CFM\u003c\/li\u003e\n\u003cli\u003e.300” – 255 CFM\u003c\/li\u003e\n\u003cli\u003e.400” – 313 CFM\u003c\/li\u003e\n\u003cli\u003e.500” – 355 CFM\u003c\/li\u003e\n\u003cli\u003e.600” – 382 CFM\u003c\/li\u003e\n\u003cli\u003e.700” – 393 CFM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eExhaust (No Pipe)\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e.200” – 117 CFM\u003c\/li\u003e\n\u003cli\u003e.300” – 160 CFM\u003c\/li\u003e\n\u003cli\u003e.400” – 209 CFM\u003c\/li\u003e\n\u003cli\u003e.500” – 224 CFM\u003c\/li\u003e\n\u003cli\u003e.600” – 235 CFM\u003c\/li\u003e\n\u003cli\u003e.700” – 247 CFM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 273 LS7 delivers outstanding mid-lift efficiency with dominant high-lift airflow, making it ideal for aggressive street \/ strip combinations.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003ePremium Hardware \u0026amp; Construction\u003c\/strong\u003e\u003c\/summary\u003e\u003cul\u003e\n\u003cli\u003e6-bolt Brodix LS7 casting\u003c\/li\u003e\n\u003cli\u003e12° valve angle with OEM LS7 valve spacing\u003c\/li\u003e\n\u003cli\u003eStock Valve Lengths\u003c\/li\u003e\n\u003cli\u003e273cc CNC intake port\u003c\/li\u003e\n\u003cli\u003e93cc exhaust port\u003c\/li\u003e\n\u003cli\u003e70.5cc CNC combustion chambers (milling available at no charge)\u003c\/li\u003e\n\u003cli\u003e2.200” titanium intake valves\u003c\/li\u003e\n\u003cli\u003e1.610” stainless exhaust valves\u003c\/li\u003e\n\u003cli\u003eBronze guides\u003c\/li\u003e\n\u003cli\u003ePAC .660” dual spring package\u003c\/li\u003e\n\u003cli\u003eTitanium retainers\u003c\/li\u003e\n\u003cli\u003eViton seals\u003c\/li\u003e\n\u003cli\u003e1.250” steel spring seats\u003c\/li\u003e\n\u003cli\u003eChamber softening available\u003c\/li\u003e\n\u003cli\u003eFlat milling at .006” per cc\u003c\/li\u003e\n\u003cli\u003eMinimum bore: 4.100”\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eDesigned for LS7 Street \u0026amp; Strip Builds\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eWith airflow over 390 CFM at .700” lift, the Mangum Racing 273 LS7 casting is capable of supporting serious naturally aspirated horsepower in 427+ cubic inch combinations, while also providing the strength required for high-cylinder-pressure boosted applications.\u003c\/p\u003e\n\u003cp\u003eStock pushrod length works in many applications but should always be verified based on camshaft selection and final milling.\u003c\/p\u003e\u003c\/details\u003e","brand":"Mangum Racing","offers":[{"title":"TSP\/PAC .660\" Polished Springs","offer_id":52550890488084,"sku":null,"price":3899.99,"currency_code":"USD","in_stock":true},{"title":"PAC 1207x .700\" Springs","offer_id":52550890520852,"sku":null,"price":3999.99,"currency_code":"USD","in_stock":true},{"title":"PAC 1208x .750\" Springs","offer_id":52550890553620,"sku":null,"price":3999.99,"currency_code":"USD","in_stock":true},{"title":"PAC 1209x .750\" Springs","offer_id":52550890586388,"sku":null,"price":3999.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/8434\/8180\/files\/BrodixLS7.1.jpg?v=1779916505"},{"product_id":"mangum-racing-brodix-ls7-big-valve-283cc-ls7-cylinder-heads","title":"Mangum Racing Brodix LS7 Big Valve 283cc LS7 Cylinder Heads","description":"\u003cp\u003e\u003cb\u003eMangum Racing CNC Ported Brodix 283 LS7 Cylinder Heads\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eBuilt for customers demanding maximum performance from an LS7-based cylinder head, the Mangum Racing 283 BR7 program represents the next step up in airflow and capability from our proven 273cc package.\u003c\/p\u003e\n\u003cp\u003eDeveloped from the race-proven Brodix BR7 LS7 casting, this larger runner \/ larger valve combination features an aggressive \u003cb\u003e283cc CNC intake port\u003c\/b\u003e and upgraded valve package engineered to deliver \u003cb\u003ewell over 400 CFM of airflow\u003c\/b\u003e while maintaining excellent port efficiency and velocity. The result is a cylinder head designed for serious big boost or naturally aspirated, large cubic inch \/ high-RPM LS combinations where maximum horsepower is the priority.\u003c\/p\u003e\n\u003cp\u003eFeaturing a \u003cb\u003e12° valve angle\u003c\/b\u003e, \u003cb\u003eOEM LS7 valve spacing\u003c\/b\u003e, and robust \u003cb\u003e6-bolt Brodix casting\u003c\/b\u003e, this package provides exceptional airflow capability with the structural integrity required for high-output boosted combinations as well.\u003c\/p\u003e\n\u003cp\u003eEach set is fully CNC machined in-house on our Centroid 5-axis machining centers, finished on Newen seat and guide equipment, then hand blended, assembled, and inspected in small batches to ensure elite quality and repeatable performance.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eAirflow Performance\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003e\u003cb\u003eTested on a SuperFlow 1020 with a 4.125” Bore Plate\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eIntake (Radius Entry)\u003c\/b\u003e\u003cbr\u003e.200” – 167 CFM\u003cbr\u003e.300” – 254 CFM\u003cbr\u003e.400” – 313 CFM\u003cbr\u003e.500” – 359 CFM\u003cbr\u003e.600” – 388 CFM\u003cbr\u003e.700” – 410+ CFM\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eExhaust (No Pipe)\u003c\/b\u003e\u003cbr\u003e.200” – 117 CFM\u003cbr\u003e.300” – 160 CFM\u003cbr\u003e.400” – 209 CFM\u003cbr\u003e.500” – 224 CFM\u003cbr\u003e.600” – 235 CFM\u003cbr\u003e.700” – 247 CFM\u003c\/p\u003e\n\u003cp\u003eThe Mangum Racing 283 BR7 offers exceptional mid-lift efficiency with dominant high-lift airflow, making it an outstanding option for max-effort street\/strip and race-focused LS builds.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003ePremium Hardware \u0026amp; Construction\u003c\/strong\u003e\u003c\/summary\u003e\u003cul style=\"margin-top: 0in;\"\u003e\n\u003cli\u003e6-bolt Brodix BR7 LS7 casting\u003c\/li\u003e\n\u003cli\u003e12° valve angle with OEM LS7 valve spacing\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eStock valve lengths\u003c\/li\u003e\n\u003cli\u003e283cc CNC intake port\u003c\/li\u003e\n\u003cli\u003e93cc exhaust port\u003c\/li\u003e\n\u003cli\u003e70.5cc CNC combustion chambers (milling available at no charge)\u003c\/li\u003e\n\u003cli\u003e2.250\" Oversized titanium intake valves\u003c\/li\u003e\n\u003cli\u003eStainless exhaust valves\u003c\/li\u003e\n\u003cli\u003eBronze guides\u003c\/li\u003e\n\u003cli\u003ePAC .660” dual spring package\u003c\/li\u003e\n\u003cli\u003eTitanium retainers\u003c\/li\u003e\n\u003cli\u003eViton seals\u003c\/li\u003e\n\u003cli\u003e1.250” steel spring seats\u003c\/li\u003e\n\u003cli\u003eChamber softening available\u003c\/li\u003e\n\u003cli\u003eFlat milling at .006” per cc\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eMinimum Bore:\u003c\/b\u003e 4.100”\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eDesigned for Maximum LS7 Performance\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eWith airflow exceeding \u003cb\u003e400 CFM\u003c\/b\u003e, the Mangum Racing 283 BR7 is engineered for customers seeking elite horsepower capability from an LS7-based cylinder head. This package is ideally suited for large cubic inch naturally aspirated combinations, aggressive camshaft applications, and high-output boosted builds where ultimate airflow and top-end power take priority.\u003c\/p\u003e\n\u003cp\u003eStock pushrod length works in many applications but should always be verified based on camshaft selection and final milling.\u003c\/p\u003e\u003c\/details\u003e","brand":"Mangum Racing","offers":[{"title":"TSP\/PAC .660\" Polished Springs","offer_id":52550909559060,"sku":null,"price":3999.99,"currency_code":"USD","in_stock":true},{"title":"PAC 1207x .700\" Springs","offer_id":52550909591828,"sku":null,"price":4099.99,"currency_code":"USD","in_stock":true},{"title":"PAC 1208x .750\" Springs","offer_id":52550909624596,"sku":null,"price":4099.99,"currency_code":"USD","in_stock":true},{"title":"PAC 1209x .750\" Springs","offer_id":52550909657364,"sku":null,"price":4099.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/8434\/8180\/files\/BrodixLS7.1.jpg?v=1779916505"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/8434\/8180\/collections\/BrodixLS7.1.jpg?v=1779916666","url":"https:\/\/mangumracing.com\/collections\/ls7-rectangle-port-cylinder-heads.oembed","provider":"Mangum Racing CNC Ported Cylinder Heads","version":"1.0","type":"link"}